CN105649968B - A kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement - Google Patents

A kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement Download PDF

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Publication number
CN105649968B
CN105649968B CN201610099520.1A CN201610099520A CN105649968B CN 105649968 B CN105649968 B CN 105649968B CN 201610099520 A CN201610099520 A CN 201610099520A CN 105649968 B CN105649968 B CN 105649968B
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CN
China
Prior art keywords
control valve
valve plate
pressure limiting
cap
valve
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Application number
CN201610099520.1A
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Chinese (zh)
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CN105649968A (en
Inventor
郭志恒
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湖北仁创科技有限公司
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Priority to CN201610099520.1A priority Critical patent/CN105649968B/en
Publication of CN105649968A publication Critical patent/CN105649968A/en
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Publication of CN105649968B publication Critical patent/CN105649968B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves

Abstract

The invention provides a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement, it includes rear end cap(1), valve plate(2), rotary cylinder-block component(3), housing(4), sliding bearing(5), odd number plunger piston slippery boots assembly(6), return plate(7), swash plate(8), mechanical seal(9), drive end bearing bracket(10), axle(11), pressure limiting overflow and relief arrangement;Pump body carries pressure limiting overflow and relief arrangement is applied to pump plus pipeline plus the design of control valve of the Water hydraulics with control system compared with congenerous, and simple system, integrated level are high, pipe design is simple, cost is low.Pressure limiting overflow mechanism effectively solves the outstanding problem that pressure limiting overflow mechanism exists in terms of operational vibration, noise, regulation precision, stability, contamination resistance using machinery and double damping designs of fluid power.

Description

A kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement
Technical field
The present invention relates to displacement pump class, more particularly to a kind of water hydraulic axial plunger with pressure limiting overflow and relief arrangement Pump.
Background technology
In recent years, directly with water(Natural water after filtering, including seawater and fresh water)Proxy mineral oil is used as working media Water hydraulics and control technology obtain breakthrough progress, and in extensive engineer applied, compared to traditional fluid Pressure transmission demonstrate with environmental protection, it is clean, efficiently, working service is convenient, the low prominent superiority of operating cost.Water hydraulics Hydraulic atomized, desalinization, high pressure water cleaning, stage driving have been widely used in controlling, diving with control technology Device buoyancy regulating system, ocean engineering and other transmissions and control field.
Water hydraulic axial plunger pump is so that rotating speed is high, pressure is high, flow is big, flow pulsation is small, volume compact, lightweight etc. prominent Go out advantage, as Water Hydraulic Pump the most frequently used in Water hydraulics and control system.Limited by technology development, market is seen at present The water hydraulic axial plunger pump product of report is constant displacement pump, the serial sea water and fresh water pump of such as Denmark Danfoss companies, Britain The pure water that WaterHydrulic companies series sea water and fresh water pump, the axial plunger pump of Central China University of Science and Technology's development, Zhejiang University develop Pump etc..During using quantitative axial plunger pump as Water hydraulics and the core parts of control system, system must be provided with water hydraulic It is non-loaded when safety overflow valve and unloading valve, pressure stability and startup for maintaining system to start.Such as set in the exit of pump Single safety overflow valve and unloading valve are put, system complex, pipe design assembling difficulty, cost are high, are such as multiple ontology System, then above mentioned problem is more prominent, at present both at home and abroad in water hydraulic axial plunger pump product, there is no the pump housing to carry pressure limiting and has overflow The report of stream and relief arrangement.
The content of the invention
To solve the deficiency of the current unlimited pressurized overflow of water hydraulic axial plunger pump body and relief arrangement integrated product, this There is provided a kind of water hydraulic with pressure limiting overflow and relief arrangement on the basis of the existing research of water hydraulic axial plunger pump for invention Axial plunger pump.
The present invention includes rear end cap, valve plate, rotary cylinder-block component, housing, sliding bearing, odd number plunger piston slippery boots group Part, return plate, swash plate, mechanical seal, drive end bearing bracket, axle, pressure limiting overflow and relief arrangement, rear end cap and drive end bearing bracket are fixed respectively to pacify Mounted in the two ends of housing, valve plate is arranged on rear end cap, and in housing, the side of swash plate is arranged on drive end bearing bracket, is returned Journey disk is arranged on the opposite side of swash plate, and rotary cylinder-block component is movably arranged on the inwall of housing by sliding bearing, and position Between valve plate and swash plate, plunger piston slippery boots assembly is movably arranged in rotary cylinder-block component, and plunger piston slippery boots assembly is spherical Plunger tip activity is assemblied on swash plate, and axle activity is assemblied on drive end bearing bracket, and is connected with the transmission of rotary cylinder-block component,
Relief arrangement include main valve plug, main spring, second control valve plate, first control valve plate, control valve element, connecting rod, Soket head cap screw, armature, control valve spring, armature set and electromagnet, the side of rear end cap is provided with relief arrangement cavity, main valve plug It is movably arranged on by dynamic seal in the relief arrangement cavity on rear end cap, the first control valve plate is filled installed in rear end cap off-load The exit of cavity is put, the second control valve plate is arranged on the first control valve plate, and in relief arrangement cavity, the first control It is arranged in valve plate and the second control valve plate provided with control valve element activity cavity, electromagnet on rear end cap, armature set is arranged on electricity In magnet, armature is connected by control valve spring with armature set, and control valve element is connected by connecting rod with armature, and control valve element In the control valve element activity cavity of the second control valve plate and the first control valve plate;
Pressure limiting overflow mechanism includes adjusting screw rod, locking nut, upper end cover, spring push-rod, damping valve plate, damper, resistance Buddhist nun's spring, main spring, damping ring and main valve plug, the opposite side of rear end cap are provided with pressure limiting overflow mechanism cavity, and upper end cover is provided with Push rod is by hole, and upper end cover is fixedly mounted on the exit of rear end cap upper limit pressurized overflow device cavity, and damping ring is cyclic structure, And multiple apertures are provided with damping ring, the outer wall of damping ring is securely fitted in the inwall of rear end cap upper limit pressurized overflow device cavity On, one end of damping ring is against at the runner of rear end cap upper limit pressurized overflow device cavity, and annular groove and current are provided with main valve plug Passage, main valve plug is arranged in damping ring, and one end of damping spring is against on main valve plug, and C water stream channels, resistance are provided with damper Buddhist nun's device is located in annular groove, and the lower surface of damper is against the other end of damping spring, and damper outer wall and annular groove it Between form gap, D water stream channels are provided with damping valve plate, damping valve plate is fixedly mounted in annular groove, and is against damper Upper surface, spring push-rod is assemblied in by sealing ring activity on the inwall of rear end cap upper limit pressurized overflow device cavity, spring push-rod One end and main valve plug top between form damping cavity, the two ends of main spring are against on spring push-rod and main valve plug respectively, adjust The push rod of section screw rod through upper end cover is locked by hole and by locking nut, and adjusting screw rod push the spring push rod is moved, and is entered The mouth of a river is communicated by the D water stream channels in the C water stream channels in water stream channel, damper and damping valve plate with damping cavity.
Pump drainage mouthful passes through channel B, control valve element and the first control on the A channel on rear end cap, the first control valve plate Valve plate formation high pass valve port, control valve plate inner chamber, the second control valve board channel are connected with unloading valve right chamber;The pumping mouth of a river passes through rear C-channel on end cap, the D passages on the first control valve plate, the second valve plate annular groove, the second valve plate passage, control valve element and the Two control valve plate shapes are connected into low pass valve port, control valve plate inner chamber, the second control valve board channel with unloading valve right chamber.
Off-load main valve plug is cone valve sealing structure, off-load main valve plug and rear end cover material with the sealing valve port that rear end cap is formed For soft or hard pairing material, the material of wherein off-load main valve plug is the relatively low engineering plastics or aluminium bronze of hardness, and rear end cap is warp Cross the stainless steel material of intensive treatment.
Control valve element respectively with the first control valve plate shape into high pass valve port and with the second control valve plate shape into low pass valve Mouth is cone valve sealing structure, and encapsulant is paired into soft or hard cooperation, and it is that the relatively low engineering plastics of hardness or aluminium are blue or green to control valve element Copper, the first control valve plate and the second control valve plate are the stainless steel material by intensive treatment.
Orifice valve plate material forms for stainless steel, monel or the titanic alloy machining Jing Guo intensive treatment.
Damper be the cylindrical structure with central elongate aperture, material be stainless steel, copper alloy, engineering plastics PEEK or Engineering plastics PTFE is processed.
Pressure limiting overflow main valve plug and the seal of spring push-rod fit clearance position are O-ring seal.
Damping ring is that multiple apertures are machined with cyclic structure, ring bodies, and the endoporus coordinated with pressure limiting overflow main valve plug is The cone mouth structure of set angle and length, material is engineering plastics or copper alloy.
The technique effect of the present invention is embodied in:
The 1st, pressure limiting overflow and relief arrangement are installed on the rear end cap of water hydraulic axial plunger pump, passes through flow passage pump Discharge outlet, the water sucking mouth of pressure limiting overflow and relief arrangement and pump, save Water hydraulics and the safety overflow in control system Valve and unloading valve, simplify system, cost-effective, are conducive to system integration to design, and expand answering for water hydraulic axial plunger pump Use scope.
2nd, relief arrangement uses undamped pilot-operated type structure, and the action of off-load main valve plug is promoted by differential pressure hydraulic power, compared with electricity Magnetic force or spring force direct drive valve element action or sealed direct dynamic structure are reliable, it is adaptable to high-pressure high-flow pump housing off-load; Relatively damping pilot-operated type structure contamination resistance and reliability are greatly improved.The feelings failed in relief arrangement control valve partial act Under condition, off-load main valve plug is closed in the presence of water under high pressure, and Water Hydraulic Pump, which can still be built, presses and be operating normally, and improves aqueous Press the reliability of axial plunger pump work.
3rd, the sealing of off-load main valve plug and low pass valve port 16-2 sealings are that differential pressure hydraulic power is sealed, and pressure more high effect is more Good, sealed reliable, off-load main spring design is simple;Control valve is sealed into cone valve structure, linear sealing, good sealing effect.
4th, the pressure limiting overflow main valve plug of pressure limiting overflow mechanism is controlled using differential pressure, and pressure limiting overflow main valve plug motion hydraulic power has Imitate active area minimum, in the case of equal pressure and flow control, the design and manufacture of pressure limiting overflow main spring are more simple It is single.Using the respective outer side edges of the double dampings of machinery and fluid power, effectively avoid that general hydraulic overflow valve operation vibration is big, noise Greatly, low, poor work stability of regulation precision etc. protrudes shortcoming, improves the stability of system work.
5th, the slidably design of damper, in the case where damper damping hole is blocked because of medium pollution, in pressure limiting Motion is formed in the presence of damping cavity partial high pressure overflow main valve plug upwards, and the direction for promoting damper to damp valve port to opening is slided It is dynamic, damping valve port, connection damping cavity and cavity of resorption are opened, fixed installation damper center damping hole is effectively avoided because of medium Pollution is blocked and causes the problem of main valve can not be opened, and improves antifouling property and the water hydraulic axial direction of pressure limiting overflow mechanism The reliability of plunger pump work.
6th, fully water lubricating structure, solves the working media pollution problem that oil-water separating structure is brought, non-maintaining, effectively drop Low use cost.
Brief description of the drawings
Accompanying drawing 1 is structure principle chart of the present invention.
Accompanying drawing 2 is Fig. 1 A-A faces sectional view.
Accompanying drawing 3 is relief arrangement partial enlarged drawing.
Accompanying drawing 4 is control valve core valve board assembly structure principle chart.
Accompanying drawing 5 is pressure limiting overflow mechanism partial enlarged drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in accompanying drawing 1,2,3,4,5, the present invention includes rear end cap 1, valve plate 2, rotary cylinder-block component 3, housing 4, cunning Dynamic bearing 5, odd number plunger piston slippery boots assembly 6, return plate 7, swash plate 8, mechanical seal 9, drive end bearing bracket 10, axle 11, pressure limiting overflow and Relief arrangement, rear end cap 1 and drive end bearing bracket 10 are respectively and fixedly installed to the two ends of housing 4, and valve plate 2 is arranged on rear end cap 1, and In housing 4, the side of swash plate 8 is arranged on drive end bearing bracket 10, and return plate 7 is arranged on the opposite side of swash plate 8, rotary cylinder-block Component 3 is movably arranged on by sliding bearing 5 on the inwall of housing 4, and is located between valve plate 2 and swash plate 8, plunger piston slippery boots group Part 6 is movably arranged in rotary cylinder-block component 3, and the spherical plunger tip activity of plunger piston slippery boots assembly 6 is assemblied on swash plate 8, The activity of axle 11 is assemblied on drive end bearing bracket 10, and is connected with the transmission of rotary cylinder-block component 3,
Relief arrangement includes main valve plug 12, the control control of valve plate 14, first of main spring 13, second valve plate 15, control valve element 16th, connecting rod 17, soket head cap screw 18, armature 19, control valve spring 20, armature set 21 and electromagnet 22, the side of rear end cap 1 Provided with relief arrangement cavity, main valve plug 12 is movably arranged in the relief arrangement cavity on rear end cap 1 by dynamic seal, and first Valve plate 15 is controlled to be arranged on the exit of the relief arrangement cavity of rear end cap 1, the second control valve plate 14 is arranged on the first control valve plate On 15, and in relief arrangement cavity, provided with control valve element movable chamber in the first control control valve plate 14 of valve plate 15 and second Body, electromagnet 22 be arranged on rear end cap 1 on, armature set 21 be arranged on electromagnet 22 in, armature 19 by control valve spring 20 with Armature set 21 is connected, and control valve element 16 is connected by connecting rod 17 with armature 19, and control valve element 16 is located at the second control valve plate 14 and first control in the control valve element activity cavity of valve plate 15;
Pressure limiting overflow mechanism include adjusting screw rod 32, locking nut 23, upper end cover 24, spring push-rod 25, damping valve plate 26, Damper 27, damping spring 28, main spring 29, damping ring 30 and main valve plug 31, the opposite side of rear end cap 1 are filled provided with pressure limiting overflow Cavity is put, upper end cover 24 is provided with push rod by hole, and upper end cover 24 is fixedly mounted on the upper limit pressurized overflow device cavity of rear end cap 1 Exit, damping ring 30 is to be provided with multiple apertures in cyclic structure, and damping ring 30, after the outer wall of damping ring 30 is securely fitted in On the inwall of the upper limit pressurized overflow device cavity of end cap 1, one end of damping ring 30 is against the upper limit pressurized overflow device cavity of rear end cap 1 At runner 1-1, annular groove and water stream channel 21-1 are provided with main valve plug 31, main valve plug 31 is arranged in damping ring 30, damps bullet One end of spring 28 is against on main valve plug 31, and C water stream channels are provided with damper 27, and damper 27 is located in annular groove, damper 27 lower surface, which is against between the other end of damping spring 28, and the outer wall and annular groove of damper 27, forms gap, orifice valve D water stream channels are provided with plate 26, damping valve plate 26 is fixedly mounted in annular groove, and is against the upper surface of damper 27, spring Push rod 25 is assemblied in by sealing ring activity on the inwall of the upper limit pressurized overflow device cavity of rear end cap 1, one end of spring push-rod 25 Damping cavity is formed between the top of main valve plug 31, the two ends of main spring 29 are against on spring push-rod 25 and main valve plug 31 respectively, The push rod of adjusting screw rod 32 through upper end cover 24 is locked by hole and by locking nut 23, and the push the spring of adjusting screw rod 32 is pushed away Bar 25 is moved, and water inlet 1-1 passes through the D current in the C water stream channels in water stream channel 21-1, damper 27 and damping valve plate 26 Passage is communicated with damping cavity.
Pump drainage mouthful by the channel B 15-1 on the A channel 1-1 on rear end cap, the first control valve plate, control valve element 16 with The first control formation high pass valve port of valve plate 15 16-1, control valve plate inner chamber 15-2, the second control valve board channel 14-2 and unloading valve Right chamber 1-4 is connected;The pumping mouth of a river passes through the D passages 15-3 on the C-channel 1-2 on rear end cap, the first control valve plate, the second valve plate Annular groove 14-3, the second valve plate passage 14-1, the control control formation low pass valve port of valve plate 14 of valve element 16 and second 16-2, control valve Plate inner chamber 15-2, the second control valve board channel 14-2 are connected with unloading valve right chamber 1-4.
Off-load main valve plug 12 is cone valve sealing structure, off-load main valve plug 12 and rear end with the sealing valve port that rear end cap 1 is formed The material of lid 1 is soft-hard pairing material, and the material of wherein off-load main valve plug 12 is the relatively low engineering plastics or aluminium bronze of hardness, Rear end cap 1 is the stainless steel material Jing Guo intensive treatment.
Valve element 16 is controlled to control the shape of valve plate 14 with the high pass valve port 16-1 of the first control formation of valve plate 15 and with second respectively Into low pass valve port 16-2 be cone valve sealing structure, encapsulant be paired into it is soft-hard coordinate, control valve element 16 is that hardness is relatively low Engineering plastics or aluminium bronze, the first control valve plate 15 and second controls valve plate 14 to be stainless steel by intensive treatment Material.
Damping valve plate 26 material forms for stainless steel, monel or the titanic alloy machining Jing Guo intensive treatment.
Damper 27 is the cylindrical structure with central elongate aperture, and material is stainless steel, copper alloy, engineering plastics PEEK Or engineering plastics PTFE is processed.
Pressure limiting overflow main valve plug 31 and the seal of the fit clearance position of spring push-rod 25 are O-ring seal.
Damping ring 30 is to be machined with multiple apertures on cyclic structure, ring bodies, in the cooperation of pressure limiting overflow main valve plug 31 Hole is the cone mouth structure of set angle and length, and material is engineering plastics or copper alloy.
Relief arrangement component, as shown in accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, on rear end cap 1, connect pump water sucking mouth and Discharge outlet, is acted by electromagnet 22, the high-low pressure of switching off-load main valve plug right chamber 1-4 connection, so as to control off-load main valve Core 12 is opened and closed, and realizes the unloading function of pump body.Pump drainage mouthful passes through the passage 1-1 on rear end cap, the first control valve Passage 15-1 on plate, the control control formation high pass valve port of valve plate 15 of valve element 16 and first 16-1, control valve plate inner chamber 15-2, the Two control valve board channel 14-2 are connected with unloading valve right chamber 1-4;The pumping mouth of a river passes through the passage 1-2 on rear end cap, the first control Passage 15-3, the second valve plate annular groove 14-3, the second valve plate passage 14-1, the control control valve plate of valve element 16 and second on valve plate 14 formation low pass valve port 16-2, control valve plate inner chamber 15-2, the second control valve board channel 14-2 are connected with unloading valve right chamber 1-4.
The sealing valve port of off-load main valve plug 12 and rear end cap 1 formation is cone valve sealing structure, material for it is soft-match material firmly Material, the material of wherein off-load main valve plug 12 is the relatively low engineering plastics or aluminium bronze of hardness, and rear end cap 1 is to pass through intensive treatment Stainless steel material.Valve element 16 is controlled to control valve plate with the high pass valve port 16-1 of the first control formation of valve plate 15 and with second respectively The 14 low pass valve port 16-2 formed are cone valve sealing structure, and encapsulant is paired into soft-hard cooperation, and control valve element 16 is hardness Relatively low engineering plastics or aluminium bronze, the first control control valve plate 14 of valve plate 15 and second is the stainless steel by intensive treatment Material.
Pump drainage mouthful water under high pressure is acted on by runner under the use differential pressure control structure of off-load main valve plug 12, sealing state unloads The two sides of lotus main valve plug 12, effective active area is sealing valve port face area, sealed reliability is added, while the main bullet of off-load Spring 13 can use the less design of rigidity, reduce the difficulty that spring manufactures and designs;Off-load main valve plug 12 surges when opening Power is the difference that pump drainage mouthful pressure acts on off-load main valve plug cross-sectional area and sealing surface area;Liquid when off-load main valve plug is stable Power acts on making a concerted effort on valve element cross section for difference force before and after valve port, in the case of the rigidity of off-load main spring 13 is less, Relief arrangement is quick on the draw, and system reliability is high.Meanwhile, action failure, off-load main valve plug occur for relief arrangement control valve portion 12 under hydraulic power effect, and returning quickly, pump remains to build pressure, and normal work.
Pressure limiting overflow mechanism, as shown in accompanying drawing 2, accompanying drawing 5, on rear end cap 1, connects water sucking mouth and the draining of pump Mouthful, pressure limiting and the relief function of pump body are realized in the control moved by pressure limiting overflow main valve plug 31.Pressure limiting overflow main valve plug 31 Using differential pressure control structure, under non-working condition, press water passes through rear end cap runner 1-1, pressure limiting overflow main valve plug centre bore 30- 1st, damper 27, damping valve plate 26 are connected with damping cavity 25-1.The hydraulic power useful effect face that pressure limiting overflow main valve plug 31 is opened Long-pending pressurized overflow main valve plug 31 and the primary valve sealing surface area of the formation of rear end cap 1 and the difference of damping cavity 35-1 areas of being limited.Pressure limiting Overflow main valve plug 31 is opened hydraulic power effective active area and can controlled according to design control to minimum in equal pressure and flow In the case of, the design and manufacture of pressure limiting overflow main spring 29 are more simple.
Pressure limiting overflow mechanism, as shown in accompanying drawing 2, accompanying drawing 5, is interacted by damping ring 30 and pressure limiting overflow main valve plug 31 The mechanical damping of formation, hydraulic damping is formed by damping cavity 25-1 and the interaction of damper 27, in machinery and the double resistances of fluid power Under the collective effect of Buddhist nun, effectively avoid that general hydraulic overflow valve operational vibration is big, noise is big, regulation precision is low, work Stability difference etc. protrudes shortcoming, improves the stability of system work.Damper 27 is in damping spring 28, the work of damping valve plate 26 Under, by setting gap in the endoporus of pressure limiting overflow main valve plug 21, external thrust is more than the precompressed of damping spring 28 During clamp force slidably.In the case where the center damping hole of damper 27 is blocked because of medium pollution, in pressure limiting overflow main valve plug In the presence of upward kinetic damping chamber 25-1 formation partial high pressures, the direction that damper 27 is opened to damping valve port(Shown in accompanying drawing 5 Right side)Slide, open damping valve port, connection damping cavity 25-1 and pump drainage mouthful, effectively avoid in fixed installation damper Heart damping hole causes the problem of pressure limiting overflow main valve plug 31 can not be opened because medium pollution is blocked, and improves pressure limiting overflow The antifouling property of device and the reliability of water hydraulic axial plunger pump work.
The water hydraulic axial plunger pump course of work with pressure limiting overflow and relief arrangement that the present invention is provided is as follows:
Under original operating state, main shaft 11 is rotated, and drives cylinder body rotary components 3 and plunger piston slippery boots assembly 6 to rotate, and plunger is slided Boots component 6 is moved reciprocatingly by the interaction with swash plate 8 in the cylinder holes of cylinder body rotary components 3.Valve plate 2 fixes peace On rear end cap 1.Often rotate a circle, reciprocating motion of the plunger in cylinder holes once, passes through cylinder body rotary components 3 and valve plate 2 interaction, every group of plunger piston slippery boots assembly completes the process of once water suction and draining.
When starting applied to pump off-load, electromagnet 22 obtains electric, and the direction shown in armature 19 to accompanying drawing 2 or accompanying drawing 3 is moved to right, band Dynamic control valve element 16 is moved to right, and is opened low pass valve port 16-2 and is closed high pass valve port 16-1, off-load main valve plug right chamber 1-4 passes through the second control Valve plate passage 14-2 processed, valve plate inner chamber 15-2, low pass valve port 16-2, second valve plate passage 14-1 the second valve plate annular grooves 14-3, First valve plate passage 15-3, rear end cap passage 1-2 connection the pumping mouth of a river low-pressure side.With the rotation of pump, pump drainage mouthful pressure liter Height, press water enters off-load main valve plug left chamber 1-3 by passage 1-1, in the presence of press water, and off-load main valve plug 12 is to unlatching Direction is moved, and off-load main valve plug 12 is opened, and the pumping mouth of a river is connected with discharge outlet, and high-pressure pump off-load starts;In off-load main valve plug 12 Under the collective effect of front and rear pressure difference, off-load main spring 13 and frictional force etc., the dynamic stability of off-load main valve plug 12 is in a certain position, pump Continue off-load;Complete after starting, the dead electricity of electromagnet 22, in the presence of the spring force of control valve spring 20, armature 19 drives control Valve element 16 is moved to the direction for closing low pass valve port 16-2 unlatching high pass valve ports 16-1, is closed low pass valve port 16-2 and is opened high port valve Mouthful 16-1, off-load main valve plug right chamber 1-4 pass through the second control valve board channel 14-2, valve plate inner chamber 15-2, high pass valve port 16-1, the One valve plate passage 15-5, rear end cap passage 1-1 connection pump drainage mouthful high-pressure side, work of the off-load main valve plug 12 in off-load main spring 13 With lower closing primary valve, water under high pressure acts on the right-hand member shown in the accompanying drawing 2 or accompanying drawing 3 of off-load main valve plug 12 and control valve element 16, Liquid packing is formed, sealed reliable, effect is good.
During pump normal work, press water passes through runner 1-1, pressure limiting overflow main valve plug centre bore 30-1, the center of damper 27 Damping hole, damping valve plate 26 enter damping cavity 25-1.When pressure water action is in primary valve and by being acted in damping cavity 25-1 In the upward pre-pressing force made a concerted effort more than pressure limiting overflow main spring 29 of pressure limiting overflow main valve plug 31, pressure limiting overflow main valve plug Open.Moved by the push the spring push rod 25 of adjusting screw rod 32, the pre-pressing force of control pressure limiting overflow main spring 29 realizes pressure limiting The regulation of the Opening pressure of overflow main valve plug 31.
The pressure that pressure limiting overflow main valve plug 31 is opened is defined as setting pressure P0, when its exterior loaded work piece pressure is big In setting pressure P0When, pressure limiting overflow main valve plug 31 is opened, and current are uniform multiple small by passage 1-1, on damping ring 30 Hole, passage 1-2 are back to the pumping mouth of a river.Pressure limiting overflow mechanism pressure limiting overflow main valve plug 31 is in mechanical friction, hydraulic coupling, spring Under elastic force collective effect, in a certain balance and stability position, the dynamic stability of pump discharge pressure is maintained.The center of damper 27 is damped During hole plug, damping cavity 25-1 makees because of the partial high pressure that the upward moving interior water of pressure limiting overflow main valve plug 31 is compressed and produces With on damper 27, when acting on pre-pressing force of the partial high pressure thrust on damper 27 more than damping spring 28 and bottom During hydraulic thrust sum, the right side shown in damper 27 to accompanying drawing 5 is slided, and is opened damping valve port, is passed through pressure limiting overflow main valve plug Gap, damper 27 between centre bore 31-1, damper 27 and the centre bore of pressure limiting overflow main valve plug 31 and damping valve plate 26 it Between formed damping valve port connection damping cavity 25-1, the partial high pressure off-load that damping cavity 25-1 is formed, while damper 27 exists Initial sealing position is returned in the presence of damping spring 28, under mechanical friction, hydraulic coupling, spring force collective effect, limit Pressurized overflow main valve plug 31 is in a certain dynamic equilibrium position, maintains the dynamic stability of pump drainage mouthful pressure.Damper 27 is slided Dynamic structure is effectively avoided because damping hole is blocked, and damping cavity, which is internally formed partial high pressure, causes pressure limiting overflow main valve plug can not The defect of opening, improves the antifouling property of pressure limiting overflow mechanism and the reliability of water hydraulic axial plunger pump work.
Above example is the general principle and characteristic for elaborating the present invention, and the present invention is not limited by above-mentioned example, Without departing from the spirit and scope, the present invention also has various change and change, and these changes and modifications are both fallen within In scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.

Claims (8)

1. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement, it is characterised in that it includes rear end cap(1), match somebody with somebody Flow table(2), rotary cylinder-block component(3), housing(4), sliding bearing(5), odd number plunger piston slippery boots assembly(6), return plate(7)、 Swash plate(8), mechanical seal(9), drive end bearing bracket(10), axle(11), pressure limiting overflow and relief arrangement, rear end cap(1)And drive end bearing bracket (10)It is respectively and fixedly installed to housing(4)Two ends, valve plate(2)Installed in rear end cap(1)On, and positioned at housing(4)It is interior, tiltedly Disk(8)Side be arranged on drive end bearing bracket(10)On, return plate(7)Installed in swash plate(8)Opposite side on, rotary cylinder-block component (3)Pass through sliding bearing(5)It is movably arranged on housing(4)Inwall on, and positioned at valve plate(2)And swash plate(8)Between, plunger Slippery boots assembly(6)It is movably arranged on rotary cylinder-block component(3)It is interior, and plunger piston slippery boots assembly(6)Spherical plunger tip activity dress Fit over swash plate(8)On, axle(11)Activity is assemblied in drive end bearing bracket(10)On, and with rotary cylinder-block component(3)Transmission is connected,
Relief arrangement includes main valve plug(12), main spring(13), second control valve plate(14), first control valve plate(15), control Valve element(16), connecting rod(17), soket head cap screw(18), armature(19), control valve spring(20), armature set(21)And electromagnet (22), rear end cap(1)Side be provided with relief arrangement cavity, main valve plug(12)Rear end cap is movably arranged on by dynamic seal (1)On relief arrangement cavity in, first control valve plate(15)Installed in rear end cap(1)The exit of relief arrangement cavity, the Two control valve plates(14)Installed in the first control valve plate(15)On, and in relief arrangement cavity, the first control valve plate(15) With the second control valve plate(14)It is interior to be provided with control valve element activity cavity, electromagnet(22)Installed in rear end cap(1)On, armature set (21)Installed in electromagnet(22)It is interior, armature(19)Pass through control valve spring(20)With armature set(21)It is connected, controls valve element (16)Pass through connecting rod(17)With armature(19)It is connected, and control valve element(16)Positioned at the second control valve plate(14)With the first control Valve plate(15)Control valve element activity cavity in;
Pressure limiting overflow mechanism includes adjusting screw rod(32), locking nut(23), upper end cover(24), spring push-rod(25), orifice valve Plate(26), damper(27), damping spring(28), main spring(29), damping ring(30)And main valve plug(31), rear end cap(1)'s Opposite side is provided with pressure limiting overflow mechanism cavity, upper end cover(24)Pass through hole, upper end cover provided with push rod(24)After being fixedly mounted on End cap(1)The exit of upper limit pressurized overflow device cavity, damping ring(30)For cyclic structure, and damping ring(30)On be provided with it is multiple Aperture, damping ring(30)Outer wall be securely fitted in rear end cap(1)On the inwall of upper limit pressurized overflow device cavity, damping ring(30) One end be against rear end cap(1)The runner of upper limit pressurized overflow device cavity(1-1)Place, main valve plug(31)It is interior to be provided with annular groove and water Circulation road(21-1), main valve plug(31)Installed in damping ring(30)It is interior, damping spring(28)One end be against main valve plug(31)On, Damper(27)It is interior to be provided with C water stream channels, damper(27)In annular groove, damper(27)Lower surface be against damping bullet Spring(28)The other end, and damper(27)Outer wall and annular groove between form gap, damp valve plate(26)It is interior to be provided with D current Passage, damps valve plate(26)It is fixedly mounted in annular groove, and is against damper(27)Upper surface, spring push-rod(25)Pass through Sealing ring activity is assemblied in rear end cap(1)On the inwall of upper limit pressurized overflow device cavity, spring push-rod(25)One end and main valve Core(31)Top between form damping cavity, main spring(29)Two ends be against spring push-rod respectively(25)And main valve plug(31) On, adjusting screw rod(32)Through upper end cover(24)Push rod is by hole and passes through locking nut(23)Locking, and adjusting screw rod (32)Push the spring push rod(25)It is mobile, water inlet(1-1)Pass through water stream channel(21-1), damper(27)Interior C current lead to Road and damping valve plate(26)Interior D water stream channels are communicated with damping cavity.
2. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists In pump drainage mouthful passes through the A channel on rear end cap(1-1), first control valve plate on channel B(15-1), control valve element(16) With the first control valve plate(15)Form high pass valve port(16-1), control valve plate inner chamber(15-2), the second control valve board channel(14- 2)With unloading valve right chamber(1-4)Connection;The pumping mouth of a river passes through the C-channel on rear end cap(1-2), first control valve plate on D lead to Road(15-3), the second valve plate annular groove(14-3), the second valve plate passage(14-1), control valve element(16)With the second control valve plate (14)Form low pass valve port(16-2), control valve plate inner chamber(15-2), the second control valve board channel(14-2)With unloading valve right chamber (1-4)Connection.
3. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists In off-load main valve plug(12)With rear end cap(1)The sealing valve port of formation is cone valve sealing structure, off-load main valve plug(12)And rear end Lid(1)Material is soft-hard pairing material, wherein off-load main valve plug(12)Material be that the relatively low engineering plastics of hardness or aluminium are blue or green Copper, rear end cap(1)For the stainless steel material Jing Guo intensive treatment.
4. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists In control valve element(16)Respectively with the first control valve plate(15)The high pass valve port of formation(16-1)Valve plate is controlled with second(14) The low pass valve port of formation(16-2)It is cone valve sealing structure, encapsulant is paired into soft-hard cooperation, controls valve element(16)To be hard Degree relatively low engineering plastics or aluminium bronze, the first control valve plate(15)With the second control valve plate(14)It is by intensive treatment Stainless steel material.
5. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists In damping valve plate(26)Material forms for stainless steel, monel or the titanic alloy machining Jing Guo intensive treatment.
6. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists In damper(27)For the cylindrical structure with central elongate aperture, material is stainless steel, copper alloy, engineering plastics PEEK or work Engineering plastics PTFE is processed.
7. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists In pressure limiting overflow main valve plug(31)With spring push-rod(25)The seal of fit clearance position is O-ring seal.
8. a kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement according to claim 1, its feature exists It is to be machined with multiple apertures on cyclic structure, ring bodies in damping ring (30), with pressure limiting overflow main valve plug(31)The endoporus of cooperation For set angle and the cone mouth structure of length, material is engineering plastics or copper alloy.
CN201610099520.1A 2016-02-24 2016-02-24 A kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement CN105649968B (en)

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CN201610099520.1A CN105649968B (en) 2016-02-24 2016-02-24 A kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement

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Application Number Priority Date Filing Date Title
CN201610099520.1A CN105649968B (en) 2016-02-24 2016-02-24 A kind of water hydraulic axial plunger pump with pressure limiting overflow and relief arrangement

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CN105649968B true CN105649968B (en) 2017-09-22

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2043675U (en) * 1988-05-06 1989-08-30 煤炭工业部煤炭科学研究院上海研究所 Axial plunger-type high-pressure water pump made of water lubricating material
US5013219A (en) * 1989-02-09 1991-05-07 The University Of Delaware Positive displacement piston pump
GB9416783D0 (en) * 1994-08-19 1994-10-12 Microhydraulics Inc Variable delivery pump with spill control
CN102606378B (en) * 2012-03-21 2014-11-26 北京工业大学 Full water lubrication pass shaft type water hydraulic piston motor
CN102734109B (en) * 2012-05-29 2015-05-20 武汉华喜特种液压设备有限公司 Fully water-lubricated valve distribution plunger pump
CN104612956B (en) * 2014-12-11 2016-04-13 无锡市华科力士水液压有限公司 Variable quantity fully water lubricating axial piston water pump
CN204716480U (en) * 2015-06-18 2015-10-21 山东泰丰液压股份有限公司 Oblique tray type axial plunger piston variable pump
CN105240237B (en) * 2015-10-29 2017-04-26 华中科技大学 Water lubrication plunger pump

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